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910209_07

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Image #   910209-07
Name:   Cyanobacterium and green algae
Copyright:   Copyright 2006 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Light micrograph of a cyanobacterium (Anabaena sp.) and the green algae: Netrium and Zygnema sp. Anabaena sp. is a filamentous cyanobacterium. It has specialized cells called heterocysts that have the ability to fix atmospheric nitrogen in soil. Anabaena spp. are therefore valuable to farmers since they increases soil fertility and crop yields. Netrium sp. is a type of green alga (chlorophyte, Chlorophyta) called a desmid. Most desmids are unicellular, with a single nucleus and one or more chloroplasts. The cell walls all have a inner layer rich in cellulose and an outer, thickened pectin layer. Zygnema sp. is a filamentous green alga (chlorophyte, Chlorophyta) that often forms pond scum, also called ""flab"" (floating algae beds). Zygnema has 2 star-shaped chloroplasts.
Magnification*: x100
Type: LM Differential Interference Contrast
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   02.01.06 910209-07 alga Algae Bacteria bacterium blue-green alga blue-green algae blue green alga blue green algae cellulose layer crop yield cyanobacteria cyanobacterium desmid desmids flab floating algae bed floating algae beds fresh water alga fresh water algae freshwater alga freshwater algae green filamentous alga green filamentous algae heterocyst heterocysts LM Netrium nitrogen-fixing nitrogen fixation nitrogen fixing pectin layer pond scum soil fertility star-shaped chloroplast star-shaped chloroplasts star shaped chloroplast star shaped chloroplasts unicellular green alga unicellular green algae Zygnema

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